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ON THE PROPAGATOR OF THE STOKES EQUATION AND A DYNAMICAL DEFINITION OF VISCOSITY

 

作者: ROBERTO MAURI,   JACOB RUBINSTEIN,  

 

期刊: Chemical Engineering Communications  （Taylor Available online 1996）
卷期: Volume 148-150, issue 1  

页码: 385-390

 

ISSN:0098-6445

 

年代: 1996

 

DOI:10.1080/00986449608936526

 

出版商: Taylor & Francis Group

 

关键词: Stokes equation;Dynamical viscosity;Stokes propagator

 

数据来源: Taylor

 

摘要:

The propagator of the unsteady Stokes equation is shown to be dominated by the solution of a purely diffusive equation, whose dispersion coefficient is the viscosity. Pressure plays an indirect role only, by creating instantaneously a steady velocity field which decays slowly in space. Viscosity appears to measure the temporal growth of the second moment of the unsteady Stokes propagator.

 

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